EP0593791A1 - Device for displacing a dental apparatus - Google Patents

Device for displacing a dental apparatus Download PDF

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Publication number
EP0593791A1
EP0593791A1 EP92117414A EP92117414A EP0593791A1 EP 0593791 A1 EP0593791 A1 EP 0593791A1 EP 92117414 A EP92117414 A EP 92117414A EP 92117414 A EP92117414 A EP 92117414A EP 0593791 A1 EP0593791 A1 EP 0593791A1
Authority
EP
European Patent Office
Prior art keywords
support arm
parallelogram
housing
parallelogram support
guide housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92117414A
Other languages
German (de)
French (fr)
Other versions
EP0593791B1 (en
Inventor
Karl-Heinz Dipl.-Ing. Lehmann (Fh)
Günther Moritz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP92117414A priority Critical patent/EP0593791B1/en
Priority to DK92117414.0T priority patent/DK0593791T3/en
Priority to DE59208503T priority patent/DE59208503D1/en
Publication of EP0593791A1 publication Critical patent/EP0593791A1/en
Application granted granted Critical
Publication of EP0593791B1 publication Critical patent/EP0593791B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
    • F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G15/00—Operating chairs; Dental chairs; Accessories specially adapted therefor, e.g. work stands
    • A61G15/14—Dental work stands; Accessories therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/20—Undercarriages with or without wheels
    • F16M11/2007—Undercarriages with or without wheels comprising means allowing pivoting adjustment
    • F16M11/2014—Undercarriages with or without wheels comprising means allowing pivoting adjustment around a vertical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/20—Undercarriages with or without wheels
    • F16M11/2092—Undercarriages with or without wheels comprising means allowing depth adjustment, i.e. forward-backward translation of the head relatively to the undercarriage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/20—Undercarriages with or without wheels
    • F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M2200/00—Details of stands or supports
    • F16M2200/04—Balancing means
    • F16M2200/044—Balancing means for balancing rotational movement of the undercarriage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M2200/00—Details of stands or supports
    • F16M2200/06—Arms
    • F16M2200/063—Parallelogram arms

Definitions

  • the invention relates to a device for adjusting a dental device relative to a patient chair using a parallelogram support arm which is essentially upright in the basic position and which is articulated on the base side on a base part such that it can be pivoted on the one hand about a vertical axis and on the other hand about the parallelogram. Joint axes can be tilted.
  • the parallelogram support arm serves as a support for a speech fountain and an instrument holder.
  • the pivoting about the vertical axis takes place in this device in that the bottom end of the parallelogram support arm is attached to a boom, which in turn can be pivoted about a vertical axis on an adjacent equipment stand.
  • a disadvantage of such an arrangement is that a relatively large amount of space is required for pivoting, since the fulcrum lies below the stand within its outline. Furthermore, it is disadvantageous that there are different distances from the patient chair as a result of the extension arm when pivoting the speech fountain. Finally, with this arrangement there is no longitudinal displaceability of the speech fountain with respect to the patient chair.
  • the invention specified in claim 1 is based on the object of specifying a device of the type mentioned at the outset with which the disadvantages mentioned can be avoided and which are equally on the left side of a patient chair for adjusting an assistant's device and on the right side of a chair for adjustment a medical device can be used.
  • the parallelogram support arm contains two pivot bearings, one on the bottom, around which the parallelogram support arm can be pivoted relative to the base part, and at the other end of the parallelogram support arm, a further pivot support, about which the device can pivot relative to the parallelogram support arm.
  • the arrangement according to the invention also allows the horizontal displacement of the entire device relative to the patient chair without any problems, with the result that the mobility of the device, be it a doctor's device or assistant's device, can be optimally adapted to the treatment situation.
  • FIG. 1 shows a schematic representation of a dental device, generally designated 1, which is pivotally and rotatably supported on a base part 3 on the base by means of a parallelogram support arm 2.
  • the base part 3 can advantageously be flanged to a dental chair indicated by position 4.
  • the two parallelogram arms 5 and 6 are connected via joints 7, 8 and 9, 10 to connecting parts 11 and 12, which are described in more detail below.
  • the lower connection part 11 is pivotally mounted on the base part 3 by means of a vertical axle bearing 13, while the device 1 is pivotably mounted on the upper connection part 12 by means of a further vertical axis bearing 14.
  • a motor-driven lifting mechanism 15 is provided, which on joints 16, 17 on the one hand on the support arm 6 and on the other hand at a point outside the outline of the (four) articulation points 7, 8 (7 ', 8') Connection part 11 is articulated.
  • the articulation of the drive arranged outside the articulation points has the advantage that both the size and the spring force of the compression spring to be provided can be minimized.
  • the drives for pivoting the device and the entire parallelogram support arm about the vertical axes 13 and 14 are designated 18 and 19.
  • FIG. 2 shows the outer structure of the parallelogram support arm 2.
  • the two connecting parts 11 and 12 have spherical cap-shaped housings 21 and 22, which are adapted to be tubular covering parts which are formed from two half-shells 23 and 24 and taper slightly upwards.
  • the two dome-shaped housing parts 21, 22 enclose both the joints of the parallelogram support arm and the two pivot bearings.
  • FIG. 3 shows in sections 3A, 3B, 3C the internal structure of the parallelogram support arm with the two connecting parts in an exploded view.
  • 3A shows the structure of the lifting mechanism 15.
  • two spring arm halves which form a cylindrical space in the assembled state, in which a compression spring 27 is guided.
  • One end of the compression spring rests against an adjusting screw 28 via an intermediate piece (not specified in more detail), the nut 29 corresponding to it being held against rotation in a correspondingly designed recess in the housing half 26.
  • the other end of the compression spring 27 rests on an abutment in the form of a transverse bolt 30 (FIG. 3B) which, as can be seen from the dash-dotted lines, is mounted in the pull rod 6 and in the assembled state by two longitudinal guides formed on the right spring arm half 26 31 reaches through.
  • the punch 32 of a worm 33 which is driven by an electric motor 34, bears against the abutment 30.
  • Screw 33 and drive motor 34 are held in a box-shaped housing 35 which is provided with a longitudinal guide 36.
  • the longitudinal guide 31 also serves as a stop to limit the lifting movement, which has the advantage that the forces in the end positions are minimized.
  • the bearing points at the articulation points 7 and 8 or 7 'or 8' of the support arms 5 and 6 are largely relieved.
  • a housing bulge 37 is provided, in which a friction wheel ratchet 38 is mounted.
  • the locking mechanism 38 is formed from a worm wheel 39, which in the assembled state engages with the worm 33 and two disks 40 and 41, which are in contact with both sides with frictional force.
  • the frictional force is achieved by bracing the disks by means of a bearing bolt 42 and a clamping nut 43.
  • the worm wheel 39 is placed on the bearing pin 42 in a freely rotatable manner; by the two disks 40 and 41, which press against the lateral surfaces of the worm wheel with a defined contact pressure, it is held in place with a defined holding force.
  • the holding force is dimensioned such that the worm wheel cannot rotate when the worm is adjusted by motor, which has the consequence that the entire drive system, consisting of motor 34, worm 33 and housing 35 and guide 36, can move in the axial direction.
  • the compression spring 27 can thus be tensioned or relaxed, as a result of which the holding force and thus the height of the parallelogram support arm can be adjusted.
  • the frictional force acting on the worm wheel 39 is dimensioned such that the parallelogram support arm can be adjusted both by hand and by motor. In the case of manual adjustment, when the parallelogram support arm is inclined, the worm wheel 39 is rotated, as a result of which its toothing can roll on the (non-rotating and therefore fixed) worm.
  • FIG. 3C shows the structure of the connection parts of the parallelogram support arm on the floor and on the device.
  • the base part 3 contains a housing part 45 with a central inner bore 46 into which bearings 47 are inserted for the rotatable mounting of a pin 48.
  • the pin 48 is an integral part of the connecting part 11, which, as can be seen from the reference notes, contains corresponding bearings on the one hand for the joints 7 and 8 or 7a, 8a and on the other hand for the articulation of the spring housing half 26.
  • a gearwheel 49 is pushed on, which in the assembled state engages with a pinion 50 of the drive motor 18.
  • the free rotatability of the gear 49 is, however, limited by a defined frictional force, which is achieved by bracing a resilient corrugated washer 52.
  • the frictional force acting on the gear 49 is - similar to the friction lock 38 of the lifting mechanism 15 - adjusted so that when the motor is adjusted via the drive 18, the pinion 50 can roll on the toothing 49, as a result of which the connecting part 11 is opposite the housing 45 is rotated.
  • the frictional force is overcome, as a result of which the connecting part 11 with the pin 48 can be rotated relative to the fixed gear 49.
  • the upper connecting part 12 is constructed identically, so that it is not necessary to designate and describe these parts.
  • a control disk 53 is located between the gear wheel 49 and the bearings 47 and is connected to a stop pin 54 cooperates, which is guided in a bushing 55 of the pull rod 6.
  • the stop pin 54 limits the rotatability of the parallelogram support arm relative to the base part 3, depending on the height setting of the support arm.
  • the control disk 53 contains a control cam 56, on the path of which the stop pin 54 moves in the end positions with a height adjustment.
  • the control cam 56 circumscribes, in conjunction with a recess 57 in the housing 45 of the base part 3, an envelope curve within the limits of which the support arm can be moved by means of the control disk.
  • the housing part 45 contains on the circumference a toothing 58, which cooperates with a position indicator, not shown, with which the angle of rotation between the connecting part 11 and the base part 3 can be measured and passed on to an electronic control unit as an electrical measured value.
  • the path detection which takes place for the rotary movement and for the lifting movement, enables the support arm system to be programmed in different positions. This can also be done analogously to one of the positioning positions of the patient chair. Certain program positions of the support arm could thus be assigned to certain program positions of the support arm, which could be triggered, for example, by a common touch function.
  • the support arm construction described advantageously makes it possible to design the devices to be carried - for example doctor's and helper devices - as independent units.
  • Optimal adaptation can be achieved, in particular, by the two pivot bearings arranged in an advantageous manner achieve the different treatment positions, it being possible to hold the device at the same distance from the patient chair in any inclination position of the support arm.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

There is proposed a device for displacing a dental apparatus (1) in relation to a treatment chair (4), in which there is used a parallelogram support arm (2) which stands essentially upright in the basic position and is coupled to a base part (3) at the floor end in such a way that it can be pivoted about a vertical axle (13), on the one hand, and can be inclined about the parallelogram articulation axles (7, 7', 8, 8') on the other. The bearing (47, 48) with the vertical pivoting axle (13) is arranged essentially centrically within the contours of the articulation axles (7, 7', 8, 8') at the floor end in a connecting member (11). <IMAGE>

Description

Die Erfindung bezieht sich auf eine Vorrichtung zur Verstellung eines zahnärztlichen Gerätes relativ zu einem Patientenstuhl unter Verwendung eines in der Grundstellung im wesentlichen aufrechtstehenden Parallelogrammtragarmes, der bodenseitig an einem Basisteil derart angelenkt ist, daß er einerseits um eine lotrechte Achse schwenkbar und andererseits um die Parallelogramm-Gelenkachsen neigbar ist.The invention relates to a device for adjusting a dental device relative to a patient chair using a parallelogram support arm which is essentially upright in the basic position and which is articulated on the base side on a base part such that it can be pivoted on the one hand about a vertical axis and on the other hand about the parallelogram. Joint axes can be tilted.

Eine solche Vorrichtung ist beispielsweise aus der DE-20 60 278 bekannt. Der Parallelogrammtragarm dient dort als Träger für eine Speifontäne und eine Instrumentenhalterung. Das Schwenken um die lotrechte Achse erfolgt bei diesem Gerät dadurch, daß das bodenseitige Ende des Parallelogrammtragarmes an einem Ausleger befestigt ist, der wiederum um eine vertikale Achse an einem benachbarten Geräteständer geschwenkt werden kann.Such a device is known for example from DE-20 60 278. The parallelogram support arm serves as a support for a speech fountain and an instrument holder. The pivoting about the vertical axis takes place in this device in that the bottom end of the parallelogram support arm is attached to a boom, which in turn can be pivoted about a vertical axis on an adjacent equipment stand.

Nachteilig bei einer solchen Anordnung ist, daß zum Schwenken relativ viel Platz benötigt wird, denn der Drehpunkt liegt unterhalb des Ständers also innerhalb dessen Grundrisses. Weiterhin ist es nachteilig, daß sich infolge des Auslegers beim Verschwenken der Speifontäne unterschiedliche Abstände zum Patientenstuhl ergeben. Schließlich ist mit dieser Anordnung keine Längsverschiebbarkeit der Speifontäne in bezug auf den Patientenstuhl gegeben.A disadvantage of such an arrangement is that a relatively large amount of space is required for pivoting, since the fulcrum lies below the stand within its outline. Furthermore, it is disadvantageous that there are different distances from the patient chair as a result of the extension arm when pivoting the speech fountain. Finally, with this arrangement there is no longitudinal displaceability of the speech fountain with respect to the patient chair.

Der im Anspruch 1 angegebenen Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art anzugeben, mit der die genannten Nachteile vermieden werden können und die gleichermaßen auf der linken Seite eines Patientenstuhles zur Verstellung eines Helferinnengerätes als auch auf der rechten Seite eines Stuhles zur Verstellung eines Arztgerätes eingesetzt werden kann.The invention specified in claim 1 is based on the object of specifying a device of the type mentioned at the outset with which the disadvantages mentioned can be avoided and which are equally on the left side of a patient chair for adjusting an assistant's device and on the right side of a chair for adjustment a medical device can be used.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung enthält der Parallelogrammtragarm zwei Schwenklager, ein bodenseitiges, um das der Parallelogrammtragarm gegenüber dem Basisteil schwenkbar ist, und am anderen Ende des Parallelogrammtragarmes ein weiteres Schwenklager, um das das Gerät gegenüber dem Parallelogrammtragarm schwenkbar ist. Dadurch ist eine Drehbarkeit in zwei Ebenen gegeben, die in Verbindung mit der Neigbarkeit des Parallelogrammtragarmes eine dreidimensionale Bewegung und damit Verstellung des Gerätes in einem sehr weiten Winkelbereich ermöglicht. Die erfindungsgemäße Anordnung erlaubt außerdem, problemlos eine horizontale Verschiebbarkeit des gesamten Gerätes gegenüber dem Patientenstuhl vorzusehen, mit der Folge, daß die Beweglichkeit des Gerätes, sei es Arztgerät oder Helferinnengerät, optimal an die Behandlungssituation angepaßt werden kann.According to an advantageous embodiment of the invention, the parallelogram support arm contains two pivot bearings, one on the bottom, around which the parallelogram support arm can be pivoted relative to the base part, and at the other end of the parallelogram support arm, a further pivot support, about which the device can pivot relative to the parallelogram support arm. This means that it can be rotated in two planes, which, in conjunction with the inclination of the parallelogram support arm, enables three-dimensional movement and thus adjustment of the device in a very wide angular range. The arrangement according to the invention also allows the horizontal displacement of the entire device relative to the patient chair without any problems, with the result that the mobility of the device, be it a doctor's device or assistant's device, can be optimally adapted to the treatment situation.

Weitere Vorteile ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles.Further advantages result from the following description of an exemplary embodiment.

Es zeigen:

  • Figur 1 eine Prinzipdarstellung eines möglichen Anwendungsfalles des erfindungsgemäßen Parallelogrammtragarmes,
  • Figur 2 die äußeren Verkleidungsteile des erfindungsgemäßen Tragarmes,
  • Figuren 3A, 3B, 3C Einzelteile des erfindungsgemäßen Tragarmes in einer Explosionsdarstellung,
  • Figur 4 einen Ausschnitt der Konstruktion im montierten Zustand im Längsschnitt.
Show it:
  • FIG. 1 shows a basic illustration of a possible application of the parallelogram support arm according to the invention,
  • FIG. 2 the outer covering parts of the support arm according to the invention,
  • 3A, 3B, 3C individual parts of the support arm according to the invention in an exploded view,
  • Figure 4 shows a detail of the construction in the assembled state in longitudinal section.

Die Figur 1 zeigt in einer schematischen Darstellung ein zahnärztliches, allgemein mit 1 bezeichnetes Gerät, welches mittels eines Parallelogrammtragarmes 2 an einem bodenseitigen Basisteil 3 schwenkbar und drehbar gehaltert ist. Das Basisteil 3 kann mit Vorteil an einem zahnärztlichen, mit der Position 4 angedeuteten Patientenstuhl angeflanscht sein. Die beiden Parallelogrammarme 5 und 6 sind über Gelenke 7, 8 und 9, 10 mit nachfolgend noch näher beschriebenen Anschlußteilen 11 und 12 verbunden. Das untere Anschlußteil 11 ist mittels einer vertikalen Achslagerung 13 schwenkbar am Basisteil 3 gelagert, während das Gerät 1 mittels einer weiteren vertikalen Achslagerung 14 schwenkbar am oberen Anschlußteil 12 gelagert ist. Zwischen den beiden Parallelogrammarmen 5 und 6 ist eine motorisch antreibbare Hubmechanik 15 vorgesehen, die über Gelenke 16, 17 einerseits am Tragarm 6 und andererseits an einer außerhalb der Umrisse der (vier) Gelenkpunkte 7, 8 (7', 8') gelegenen Stelle des Anschlußteiles 11 angelenkt ist. Die außerhalb der Gelenkpunkte angeordnete Anlenkung des Antriebs hat den Vorteil, daß sowohl die Baugröße als auch die vorzusehende Federkraft der Druckfeder minimiert werden kann. Die Antriebe für das Verschwenken des Gerätes sowie des gesamten Parallelogrammtragarmes um die vertikalen Achsen 13 und 14 sind mit 18 und 19 bezeichnet.1 shows a schematic representation of a dental device, generally designated 1, which is pivotally and rotatably supported on a base part 3 on the base by means of a parallelogram support arm 2. The base part 3 can advantageously be flanged to a dental chair indicated by position 4. The two parallelogram arms 5 and 6 are connected via joints 7, 8 and 9, 10 to connecting parts 11 and 12, which are described in more detail below. The lower connection part 11 is pivotally mounted on the base part 3 by means of a vertical axle bearing 13, while the device 1 is pivotably mounted on the upper connection part 12 by means of a further vertical axis bearing 14. Between the two parallelogram arms 5 and 6, a motor-driven lifting mechanism 15 is provided, which on joints 16, 17 on the one hand on the support arm 6 and on the other hand at a point outside the outline of the (four) articulation points 7, 8 (7 ', 8') Connection part 11 is articulated. The articulation of the drive arranged outside the articulation points has the advantage that both the size and the spring force of the compression spring to be provided can be minimized. The drives for pivoting the device and the entire parallelogram support arm about the vertical axes 13 and 14 are designated 18 and 19.

Die Figur 2 zeigt den äußeren Aufbau des Parallelogrammtragarmes 2. Die beiden Anschlußteile 11 und 12 weisen kugelkalottenförmige Gehäuse 21 und 22 auf, denen angepaßt aus zwei Halbschalen 23 und 24 gebildete rohrförmige, nach oben leicht konisch zulaufende Verkleidungsteile sind. Die beiden kalottenförmigen Gehäuseteile 21, 22 umschließen sowohl die Gelenke des Parallelogrammtragarmes als auch die beiden Drehlager.FIG. 2 shows the outer structure of the parallelogram support arm 2. The two connecting parts 11 and 12 have spherical cap-shaped housings 21 and 22, which are adapted to be tubular covering parts which are formed from two half-shells 23 and 24 and taper slightly upwards. The two dome-shaped housing parts 21, 22 enclose both the joints of the parallelogram support arm and the two pivot bearings.

Die Figur 3 zeigt in den Abschnitten 3A, 3B, 3C den Innenaufbau des Parallelogrammtragarmes mit den beiden Anschlußteilen in einer Explosionsdarstellung.3 shows in sections 3A, 3B, 3C the internal structure of the parallelogram support arm with the two connecting parts in an exploded view.

Die Figur 3A läßt den Aufbau des Hubmechanismuses 15 erkennen.3A shows the structure of the lifting mechanism 15.

Mit 25 und 26 sind zwei Federarmhälften bezeichnet, die im montierten Zustand einen zylindrischen Raum bilden, in dem eine Druckfeder 27 geführt ist. Das eine Ende der Druckfeder liegt über ein nicht näher bezeichnetes Zwischenstück an einer Stellschraube 28 an, deren mit ihr korrespondierende Mutter 29 in einer entsprechend ausgebildeten Ausnehmung der Gehäusehälfte 26 verdrehsicher gehaltert ist. Das andere Ende der Druckfeder 27 liegt an einem Widerlager in Form eines Querbolzens 30 (Fig. 3B) an, der, wie aus der strichpunktierten Linienführung ersichtlich, in der Zugstange 6 gelagert ist und im montierten Zustand durch zwei an der rechten Federarmhälfte 26 angeformte Längsführungen 31 hindurchgreift. An dem Widerlager 30 liegt der Stempel 32 einer Schnecke 33 an, die von einem Elektromotor 34 angetrieben wird. Schnecke 33 und Antriebsmotor 34 sind in einem kastenförmigen Gehäuse 35, der mit einer Längsführung 36 versehen ist, gehaltert.With 25 and 26 two spring arm halves are designated, which form a cylindrical space in the assembled state, in which a compression spring 27 is guided. One end of the compression spring rests against an adjusting screw 28 via an intermediate piece (not specified in more detail), the nut 29 corresponding to it being held against rotation in a correspondingly designed recess in the housing half 26. The other end of the compression spring 27 rests on an abutment in the form of a transverse bolt 30 (FIG. 3B) which, as can be seen from the dash-dotted lines, is mounted in the pull rod 6 and in the assembled state by two longitudinal guides formed on the right spring arm half 26 31 reaches through. The punch 32 of a worm 33, which is driven by an electric motor 34, bears against the abutment 30. Screw 33 and drive motor 34 are held in a box-shaped housing 35 which is provided with a longitudinal guide 36.

Die Längsführung 31 dient gleichzeitig als Anschlag zur Begrenzung der Hubbewegung, was den Vorteil erbringt, daß die Kräfte in den Endlagen minimiert werden. Die Lagerstellen an den Anlenkpunkten 7 und 8 bzw. 7' bzw. 8' der Tragarme 5 und 6 werden dadurch weitgehend entlastet.The longitudinal guide 31 also serves as a stop to limit the lifting movement, which has the advantage that the forces in the end positions are minimized. The bearing points at the articulation points 7 and 8 or 7 'or 8' of the support arms 5 and 6 are largely relieved.

Im oberen Teil der rechten Federarmhälfte 26 ist eine Gehäuseausbuchtung 37 vorgesehen, in der ein Reibradgesperre 38 gelagert ist. Das Gesperre 38 wird gebildet aus einem Schneckenrad 39, welches im montierten Zustand mit der Schnecke 33 in Eingriff steht und zwei beidseitig mit Reibkraft anliegenden Scheiben 40 und 41. Die Reibkraft wird durch Verspannen der Scheiben mittels eines Lagerbolzens 42 und einer Spannmutter 43 erreicht. Das Schneckenrad 39 ist auf dem Lagerbolzen 42 an sich frei drehbar aufgesetzt; durch die beiden Scheiben 40 und 41, die mit einer definierten Anpreßkraft gegen die seitlichen Flächen des Schneckenrades drücken, wird es jedoch mit einer definierten Haltekraft festgehalten. Die Haltekraft ist dabei so bemessen, daß sich das Schneckenrad bei einer motorischen Verstellung der Schnecke nicht drehen kann, was zur Folge hat, daß sich das gesamte Antriebssystem, bestehend aus Motor 34, Schnecke 33 sowie Gehäuse 35 und Führung 36 in Achsrichtung bewegen kann. Je nach Drehrichtung des Motors 34 kann somit die Druckfeder 27 gespannt oder entspannt werden, wodurch sich die Haltekraft und damit die Höhenlage des Parallelogrammtragarmes verstellen läßt. Die Reibkraft, die auf das Schneckenrad 39 wirkt, ist so bemessen, daß eine Verstellung des Parallelogrammtragarmes sowohl von Hand als auch motorisch möglich ist. Im Falle einer Verstellung von Hand wird bei einem Neigen des Parallelogrammtragarmes das Schneckenrad 39 gedreht, wodurch sich dessen Verzahnung auf der (nicht drehenden und daher feststehenden) Schnecke abwälzen kann.In the upper part of the right spring arm half 26, a housing bulge 37 is provided, in which a friction wheel ratchet 38 is mounted. The locking mechanism 38 is formed from a worm wheel 39, which in the assembled state engages with the worm 33 and two disks 40 and 41, which are in contact with both sides with frictional force. The frictional force is achieved by bracing the disks by means of a bearing bolt 42 and a clamping nut 43. The worm wheel 39 is placed on the bearing pin 42 in a freely rotatable manner; by the two disks 40 and 41, which press against the lateral surfaces of the worm wheel with a defined contact pressure, it is held in place with a defined holding force. The holding force is dimensioned such that the worm wheel cannot rotate when the worm is adjusted by motor, which has the consequence that the entire drive system, consisting of motor 34, worm 33 and housing 35 and guide 36, can move in the axial direction. Depending on the direction of rotation of the motor 34, the compression spring 27 can thus be tensioned or relaxed, as a result of which the holding force and thus the height of the parallelogram support arm can be adjusted. The frictional force acting on the worm wheel 39 is dimensioned such that the parallelogram support arm can be adjusted both by hand and by motor. In the case of manual adjustment, when the parallelogram support arm is inclined, the worm wheel 39 is rotated, as a result of which its toothing can roll on the (non-rotating and therefore fixed) worm.

Die Figur 3C läßt den Aufbau der boden- und geräteseitigen Anschlußteile des Parallelogrammtragarmes erkennen.FIG. 3C shows the structure of the connection parts of the parallelogram support arm on the floor and on the device.

Das Basisteil 3 enthält ein Gehäuseteil 45 mit einer zentralen Innenbohrung 46, in die Lager 47 zur drehbaren Lagerung eines Zapfens 48 eingesetzt sind. Der Zapfen 48 ist integraler Bestandteil des Anschlußteils 11, der, wie durch die Bezugshinweise ersichtlich, entsprechende Lager einerseits für die Gelenke 7 und 8 bzw. 7a, 8a und andererseits für die Anlenkung der Federgehäusehälfte 26 enthält. Auf dem Zapfen 48 ist lose, d.h. an sich frei drehbar, ein Zahnrad 49 aufgeschoben, welches im montierten Zustand mit einem Ritzel 50 des Antriebsmotors 18 in Eingriff steht. Die freie Drehbarkeit des Zahnrades 49 ist jedoch durch eine definierte Reibkraft eingeschränkt, welche durch Verspannen einer federnden Wellscheibe 52 erzielt wird. Die Reibkraft, die auf das Zahnrad 49 wirkt, ist - ähnlich wie bei dem Reibradgesperre 38 der Hubmechanik 15 - so eingestellt, daß bei einer motorischen Verstellung über den Antrieb 18 sich das Ritzel 50 an der Verzahnung 49 abwälzen kann, wodurch das Anschlußteil 11 gegenüber dem Gehäuse 45 gedreht wird. Bei Verstellung von Hand dagegen wird die Reibkraft überwunden, wodurch sich das Anschlußteil 11 mit dem Zapfen 48 gegenüber dem feststehenden Zahnrad 49 drehen läßt.The base part 3 contains a housing part 45 with a central inner bore 46 into which bearings 47 are inserted for the rotatable mounting of a pin 48. The pin 48 is an integral part of the connecting part 11, which, as can be seen from the reference notes, contains corresponding bearings on the one hand for the joints 7 and 8 or 7a, 8a and on the other hand for the articulation of the spring housing half 26. There is loose on the pin 48, i.e. per se freely rotatable, a gearwheel 49 is pushed on, which in the assembled state engages with a pinion 50 of the drive motor 18. The free rotatability of the gear 49 is, however, limited by a defined frictional force, which is achieved by bracing a resilient corrugated washer 52. The frictional force acting on the gear 49 is - similar to the friction lock 38 of the lifting mechanism 15 - adjusted so that when the motor is adjusted via the drive 18, the pinion 50 can roll on the toothing 49, as a result of which the connecting part 11 is opposite the housing 45 is rotated. In the case of manual adjustment, on the other hand, the frictional force is overcome, as a result of which the connecting part 11 with the pin 48 can be rotated relative to the fixed gear 49.

Das obere Anschlußteil 12 ist baugleich aufgebaut, so daß davon abgesehen wird, diese Teile zu bezeichnen und zu beschreiben.The upper connecting part 12 is constructed identically, so that it is not necessary to designate and describe these parts.

Zwischen dem Zahnrad 49 und den Lagern 47 befindet sich eine Steuerscheibe 53, die mit einem Anschlagstift 54 zusammenwirkt, der in einer Buchse 55 des Zugstabes 6 geführt ist. Der Anschlagstift 54 begrenzt die Drehbarkeit des Parallelogrammtragarmes gegenüber dem Basisteil 3, und zwar in Abhängigkeit von der Höheneinstellung des Tragarmes. Hierzu enthält die Steuerscheibe 53 eine Steuerkurve 56, auf deren Bahn sich der Anschlagstift 54 in den Endlagen bei einer Höhenverstellung bewegt.A control disk 53 is located between the gear wheel 49 and the bearings 47 and is connected to a stop pin 54 cooperates, which is guided in a bushing 55 of the pull rod 6. The stop pin 54 limits the rotatability of the parallelogram support arm relative to the base part 3, depending on the height setting of the support arm. For this purpose, the control disk 53 contains a control cam 56, on the path of which the stop pin 54 moves in the end positions with a height adjustment.

Die Steuerkurve 56 umschreibt in Verbindung mit einer Aussparung 57 im Gehäuse 45 des Basisteils 3 eine Hüllkurve, in deren durch die Steuerscheibe verstellbaren Grenzen sich der Tragarm bewegen läßt.The control cam 56 circumscribes, in conjunction with a recess 57 in the housing 45 of the base part 3, an envelope curve within the limits of which the support arm can be moved by means of the control disk.

Das Gehäuseteil 45 enthält am Umfang eine Verzahnung 58, die mit einem nicht dargestellten Positionsmelder zusammenwirkt, mit dem der Drehwinkel zwischen Anschlußteil 11 und Basisteil 3 gemessen und als elektrischer Meßwert an eine Regelelektronik weitergegeben werden kann.The housing part 45 contains on the circumference a toothing 58, which cooperates with a position indicator, not shown, with which the angle of rotation between the connecting part 11 and the base part 3 can be measured and passed on to an electronic control unit as an electrical measured value.

Die Wegerfassung, die für die Drehbewegung und für die Hubbewegung erfolgt, ermöglicht eine Programmierung des Tragarmsystems in verschiedenen Positionen. Dies kann analog auch zu einer der Lagerungspositionen des Patientenstuhles erfolgen. Damit könnten bestimmten Programmstellungen des Tragarmes bestimmte Programmstellungen des Patientenstuhles zugeordnet werden, welche beispielsweise durch eine gemeinsame Tastfunktion ausgelöst werden könnten.The path detection, which takes place for the rotary movement and for the lifting movement, enables the support arm system to be programmed in different positions. This can also be done analogously to one of the positioning positions of the patient chair. Certain program positions of the support arm could thus be assigned to certain program positions of the support arm, which could be triggered, for example, by a common touch function.

Die beschriebene Tragarmkonstruktion ermöglicht mit Vorteil, die zu tragenden Geräte - z.B. Arzt- und Helferingerät - als eigenständige Einheiten auszubilden. Insbesondere durch die beiden, in vorteilhafter Weise angeordneten Drehlager läßt sich eine optimale Anpassung an die unterschiedlichen Behandlungspositionen erzielen, wobei es möglich ist, das Gerät in jeder Neigungslage des Tragarmes auf gleichen Abstand zum Patientenstuhl zu halten.The support arm construction described advantageously makes it possible to design the devices to be carried - for example doctor's and helper devices - as independent units. Optimal adaptation can be achieved, in particular, by the two pivot bearings arranged in an advantageous manner achieve the different treatment positions, it being possible to hold the device at the same distance from the patient chair in any inclination position of the support arm.

Claims (18)

Vorrichtung zur Verstellung eines zahnärztlichen Gerätes (1) in Relation zu einem Patientenstuhl (4) unter Verwendung eines in der Grundstellung im wesentlichen aufrechtstehenden Parallelogrammtragarmes (2), welcher bodenseitig an einem Basisteil (3) derart angelenkt ist, daß er einerseits um eine lotrechte Achse (13) schwenkbar und andererseits um die einen Prallelogrammgelenkachsen (7, 7', 8, 8') neigbar ist, wobei die Lagerung (47, 48) mit der lotrechten Schwenkachse (13) im wesentlichen zentrisch innerhalb der Umrisse der bodenseitigen Gelenkachsen (7, 7', 8, 8') in einem Anschlußteil (11) angeordnet ist.Device for adjusting a dental device (1) in relation to a patient chair (4) using a parallelogram support arm (2) which is essentially upright in the basic position and which is articulated on the base side to a base part (3) in such a way that it is on the one hand about a vertical axis (13) can be pivoted and, on the other hand, can be tilted about the one parallelogram joint axes (7, 7 ', 8, 8'), the bearing (47, 48) with the vertical pivot axis (13) being essentially centered within the contours of the bottom joint axes (7 , 7 ', 8, 8') is arranged in a connecting part (11). Vorrichtung nach Anspruch 1, bei der das Gerät (1) mittels einer weiteren vertikalen Achslagerung (14) an einem weiteren Anschlußteil (12) schwenkbar gelagert ist, welches am anderen Ende des Parallelogrammarmes (2) angeordnet ist.Device according to Claim 1, in which the device (1) is pivotably mounted on a further connecting part (12) which is arranged at the other end of the parallelogram arm (2) by means of a further vertical axle bearing (14). Vorrichtung nach Anspruch 2, bei der die beiden Anschlußteile (11, 12) ein kugelkalottenförmiges Gehäuse (21, 22) aufweisen, denen ein dazu passendes rohrförmiges, die Tragarmkonstruktion verkleidendes Gehäuse (23, 24) zugeordnet ist.Device according to Claim 2, in which the two connecting parts (11, 12) have a spherical cap-shaped housing (21, 22), to which a matching tubular housing (23, 24) covering the support arm construction is assigned. Vorrichtung nach Anspruch 3, bei der das Verkleidungsgehäuse (23, 24) aus zwei durch Längsteilung gebildeten Hälften besteht.Apparatus according to claim 3, wherein the casing housing (23, 24) consists of two halves formed by longitudinal division. Vorrichtung nach Anspruch 4, bei der die Hälften (23, 24) konisch geformte Halbschalen sind.Apparatus according to claim 4, wherein the halves (23, 24) are conically shaped half-shells. Vorrichtung nach Anspruch 2, bei der die beiden Anschlußteile (11,12) steuerbare Antriebe (18,19) enthalten.Device according to Claim 2, in which the two connecting parts (11, 12) contain controllable drives (18, 19). Vorrichtung nach einem der Ansprüche 1 bis 6, bei der ein Prallelogrammtragarm mit Federgewichtsausgleich vorgesehen ist, bei dem auf die Feder (27) ein motorisch angetriebenes Stellmittel (33 bis 36) einwirkt.Device according to one of Claims 1 to 6, in which a parallelogram support arm with spring weight compensation is provided, in which a motor-driven adjusting means (33 to 36) acts on the spring (27). Vorrichtung nach Anspruch 7, bei der das Stellmittel (33 bis 36) mit einer Verzahnung versehen ist, die mit der Verzahnung eines kraftabhängig lösbaren Gesperres (38) in Eingriff steht.Apparatus according to claim 7, wherein the adjusting means (33 to 36) is provided with a toothing which is in engagement with the toothing of a locking mechanism (38) which can be released as a function of force. Vorrichtung nach Anspruch 8, bei der ein durch Reibung kraftschlüssig arbeitendes Gesperre (38) vorhanden ist, wobei Reibkraft und Antriebsmoment so bemessen sind, daß der Parallelogrammtragarm sowohl motorisch als auch von Hand verstellbar ist.Apparatus according to Claim 8, in which there is a locking mechanism (38) which works by frictional engagement, the frictional force and drive torque being dimensioned such that the parallelogram support arm can be adjusted both by motor and by hand. Vorrichtung nach Anspruch 9, bei der in einem Führungsgehäuse (25, 27) eine Druckfeder (27) angeordnet ist, deren eines Ende sich an dem Gehäuse zugeordneten Stellmitteln (28, 29) abstützt und deren anderes Ende an einem im einen Parallelogrammtragarm angeordneten und im Führungsgehäuse (25, 26) geführten Widerlager (30) anliegt, bei dem weiterhin im Führungsgehäuse ein mit einer Rutschkupplung (40, 41) gekuppeltes Schneckenrad (39) drehbar gelagert ist, welches mit einer mit dem Antrieb (34) verbundenen Schnecke (33) in Eingriff steht.Apparatus according to claim 9, in which a compression spring (27) is arranged in a guide housing (25, 27), one end of which is supported on the adjusting means (28, 29) assigned to the housing and the other end of which is arranged on a parallelogram support arm and in Guide housing (25, 26) guided abutment (30) abuts, in which a worm wheel (39) coupled with a slip clutch (40, 41) is rotatably mounted in the guide housing and is connected to a worm (33) connected to the drive (34). is engaged. Vorrichtung nach Anspruch 9, bei der die Druckfeder (27) an im Führungsgehäuse (25, 26) lageveränderbar angeordneten Stellmitteln (28, 29) anliegt.Apparatus according to Claim 9, in which the compression spring (27) bears on adjusting means (28, 29) arranged in a position-changing manner in the guide housing (25, 26). Vorrichtung nach Anspruch 10, bei der die Rutschkupplung durch seitlich an den Flächen des Schneckenrades (39) anliegende, deren Drehbarkeit hemmende Scheiben (40,41) gebildet ist.Apparatus according to Claim 10, in which the slip clutch is formed by discs (40, 41) which rest against the sides of the surfaces of the worm wheel (39) and prevent their rotation. Vorrichtung nach Anspruch 10, bei der das Führungsgehäuse (25, 26) aus zwei durch Längsteilung gebildeten Hälften besteht.Apparatus according to claim 10, wherein the guide housing (25, 26) consists of two halves formed by longitudinal division. Vorrichtung nach einem der Ansprüche 7 bis 13, bei der der Hub und der Drehwinkel des Parallelogrammtragarmes durch Anschlagmittel (54 bis 56) begrenzt sind.Device according to one of Claims 7 to 13, in which the stroke and the angle of rotation of the parallelogram support arm are limited by stop means (54 to 56). Vorrichtung nach Anspruch 2, bei der die beiden Anschlußteile (11, 12) einen Zapfen (48) aufweisen, welcher mittels Lager (47) im Basisteil (3) bzw. im Gerät (1) gelagert sind, und bei der auf den Zapfen (48) durch Reibkraft gebremste Zahnräder drehbar aufgesetzt sind, welche mit dem Antriebsritzeln (50) von Stellmotoren (18, 19) in Eingriff stehen.Device according to Claim 2, in which the two connecting parts (11, 12) have a pin (48) which is mounted by means of bearings (47) in the base part (3) or in the device (1), and in which the pin ( 48) rotatably braked by friction force gears which are engaged with the drive pinion (50) of servomotors (18, 19). Vorrichtung nach Anspruch 15, bei der eine Steuerscheibe (53) vorhanden ist, die eine Steuerkurve (56) aufweist, gegen die ein am Parallelogrammtragarm befestigter Steuerzapfen (54) aufläuft, wobei die Steuerkurve (56) so ausgelegt ist, daß damit eine Begrenzung des Schwenkwinkels des Parallelogrammtragarmes in Abhängigkeit von der Höhenverstellung erzielt wird.Apparatus according to claim 15, in which there is a control disk (53) which has a control cam (56) against which a control pin (54) attached to the parallelogram support arm runs, the control cam (56) being designed such that a limitation of the Swing angle of the parallelogram support arm depending on the height adjustment is achieved. Vorrichtung nach Anspruch 2, bei der die beiden Anschlußteile (11,12) baugleich ausgebildet sind.Device according to claim 2, in which the two connecting parts (11, 12) are constructed identically. Vorrichtung nach einem der Ansprüche 9 bis 16, bei der die Anlenkstelle (17, 17') für das Führungsgehäuse (15) außerhalb der durch die Gelenkanordnung (7, 7', 8, 8') des Parallelogrammtragarmes gegebenen Umrisse am Anschlußteil (11) angeordnet ist.Device according to one of Claims 9 to 16, in which the articulation point (17, 17 ') for the guide housing (15) outside the contours on the connecting part (11) given by the articulated arrangement (7, 7', 8, 8 ') of the parallelogram support arm is arranged.
EP92117414A 1992-10-12 1992-10-12 Device for displacing a dental apparatus Expired - Lifetime EP0593791B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP92117414A EP0593791B1 (en) 1992-10-12 1992-10-12 Device for displacing a dental apparatus
DK92117414.0T DK0593791T3 (en) 1992-10-12 1992-10-12 Device for adjusting a dental instrument
DE59208503T DE59208503D1 (en) 1992-10-12 1992-10-12 Device for adjusting a dental device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92117414A EP0593791B1 (en) 1992-10-12 1992-10-12 Device for displacing a dental apparatus

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EP0593791A1 true EP0593791A1 (en) 1994-04-27
EP0593791B1 EP0593791B1 (en) 1997-05-14

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EP92117414A Expired - Lifetime EP0593791B1 (en) 1992-10-12 1992-10-12 Device for displacing a dental apparatus

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0895769A2 (en) 1997-07-30 1999-02-10 Kaltenbach & Voigt Gmbh & Co. Chair for medical or dental care
EP1324094A2 (en) * 2001-12-21 2003-07-02 Leica Microsystems (Schweiz) AG Support for optical viewing device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2060278A1 (en) * 1970-12-08 1972-06-22 Siemens Ag Dental equipment
DE2109751A1 (en) * 1971-03-02 1972-09-07 Fuva, Josef Vatter Fabrik für Elektromechanik, 8000 München Reverse head washer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2060278A1 (en) * 1970-12-08 1972-06-22 Siemens Ag Dental equipment
DE2109751A1 (en) * 1971-03-02 1972-09-07 Fuva, Josef Vatter Fabrik für Elektromechanik, 8000 München Reverse head washer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0895769A2 (en) 1997-07-30 1999-02-10 Kaltenbach & Voigt Gmbh & Co. Chair for medical or dental care
EP1324094A2 (en) * 2001-12-21 2003-07-02 Leica Microsystems (Schweiz) AG Support for optical viewing device
JP2003215465A (en) * 2001-12-21 2003-07-30 Leica Microsystems (Schweiz) Ag Apparatus for retaining optical viewing device
EP1324094A3 (en) * 2001-12-21 2004-01-07 Leica Microsystems (Schweiz) AG Support for optical viewing device
US7158292B2 (en) 2001-12-21 2007-01-02 Leica Microsystems (Schweiz) Ag Apparatus for retaining an optical viewing device

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DK0593791T3 (en) 1997-12-01
DE59208503D1 (en) 1997-06-19
EP0593791B1 (en) 1997-05-14

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